OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $25.00 Put

TOST280121P00025000

Latest saved OI4,915Oct 23, 2026
Last change+44vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $25.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4,9152,4570 2026-10-02: 4,765 OI2026-10-05: 4,811 OI2026-10-06: 4,811 OI2026-10-07: 4,811 OI2026-10-08: 4,811 OI2026-10-09: 4,874 OI2026-10-13: 4,874 OI2026-10-14: 4,874 OI2026-10-15: 4,873 OI2026-10-16: 4,873 OI2026-10-21: 4,871 OI2026-10-23: 4,915 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

TOST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20264,915+44
Oct 21, 2026Viewing4,871-2
Oct 16, 20264,8730
Oct 15, 20264,873-1
Oct 14, 20264,8740
Oct 13, 20264,8740
Oct 09, 20264,874+63
Oct 08, 20264,8110
Oct 07, 20264,8110
Oct 06, 20264,8110
Oct 05, 20264,811+46
Oct 02, 20264,765No prior observation